Re: [Xen-devel] [PATCH v3 3/8] x86: detect and initialize Intel CAT feature

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.03.15 at 19:31, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 26/03/15 12:38, Chao Peng wrote:
>> +    cpuid_count(PSR_CPUID_LEVEL_CAT, 0, &eax, &ebx, &ecx, &edx);
>> +    if ( ebx & PSR_RESOURCE_TYPE_L3 )
>> +    {
>> +        cpuid_count(PSR_CPUID_LEVEL_CAT, 1, &eax, &ebx, &ecx, &edx);
>> +        info->cbm_len = (eax & 0x1f) + 1;
>> +        info->cos_max = (edx & 0xffff);
>> +
>> +        info->enabled = 1;
>> +        printk(XENLOG_DEBUG "CAT: enabled on socket %u, cos_max:%u, 
>> cbm_len:%u\n",
>> +               socket, info->cos_max, info->cbm_len);
> 
> I would bump this to INFO, at least for socket 0.  Similar to CMT, a
> user which has gone to the effort of enabling CAT will want some
> indication in the boot log without also having to bump the logging level.

Which INFO wouldn't be sufficient for (at least not with the xen.org
defaults, not sure about XenServer's).

Jan


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